Fuel injection means for internal combustion engines



April 5, 1.932. G. wA coDRlNG-roN 'FUEL INJECTION MEANS FOR INTERNAL COMBUSTION ENGINES Filed Sept. l5, 193.0

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Patented Apr. 5, 1932 i y I Y UNITED STATES PATENT vorricE GEORGE W. CQDRINGTON, or nAKEwooD, omo

FUEL INJECTION MEANS FOR INTERNALCOMBUSTION ENGINES Application filed September 15, 1930. Serial No. 481,869.

This invention relates to liquid fuel 4intwo blocks 6 and 8, and in the nut 9, are jection means for internal combustion enpreferably of the same diameter as indicated; gines, and more particularly the invention but the opening 11 in the block 7 is of greater has to do with that type of injection system diameter than those in the adjacent blocks wherein the fuel is supplied to the several en- 6 and 8. 55

gine cylinders from a common source which 1s The valve diameters in the corresponding maintained at the injection pressure. portions of the valve are of corresponding The objects ofthe invention are to simplify diameters so that the valve is a tight fit but the injection apparatus and particularly that slidable longitudinally in the valve body portion thereof which confines the fuel. assembly'. To seat or unseat its head portion 60 Briefly the invention includes cooperative 12 against the nozzle 5, the nozzle is provalve and valve body parts wherein the fuel vided with the usual valve receiving seat, and at the injection pressure is supplied to the drilled discharge leads 13. valve; by way of a flexible connection, is The valve liasa central bore 14 which forms l5 conveyed vthrough the valve to the injection a fuel passage the entire length of the valve 65 nozzle; and the valve inclosed 4position is with the exception of terminating short of maintained seated against the nozzle by the the-valve head 12. Communicating with the pressure of the fuel itself. nozzle endV of the lead 14 the valve has a The exact nature of this invention together transverse drill 15 connecting with the cham-` with further objects and advantages thereof ber 16 in the nozzle 5. 79 will be apparent from the following descrip- The enlarged portion 17 of the valve fit-n tion taken in connection with the accompanyting in the opening l1 is somewhat shorter ing drawings, in which Fig. lis an assembly than the block 7, so that a second annularv View of the'principal pertinent parts which chamber 18 is provided at the end of the comprise a fuel injection unit for a single enblock 7 removed from the nozzleand a third 75 gine cylinder, the parts being broken away annular chamber 19 is similarly formed adto show details of construction; Fig. 2 is a jacent the nozzle end.I A drill'20 connects detail in section of the nozzle portion of parts the hollow 14 of the Valve with the outer appearing in Fig. 1. chamber 18. The inner chamber 19 has com- With reference now to the drawings the muDCatOIl Wltll a pipe 21 leading t0 OVGI- 80 valve body is of composite construction for HOW, by Way 0f a drill 22 in the block 7 a reasons which Will appear. The principal groove 23 running along the blocks 7 and 8, part of the body is a plug 1 adapted for inand a transverse drill 24 through the plug 1. sertion in the cylinder wall of theengine to The drill 24: SLlSO Preferably communicates extend between the combustion chamber and With a hOllOW 25. in the block 8. The outer 8'5 the outside of Ithe engine beyond the water end 0f the Valve 10 has COIIHGCOD With a jacket, as will be understood by one familiar source of liquid fuel Supply at high pleS- with the art. The plug 1 has a through open- Sure, by a flexible tube 26, through a suitable ing 2 externally threaded at "its inner end as COIIDGCCIOD iIlClUCliIlg the nuts 27.

40 at 3, to receive a cap 4, which cap serves as a It Will be apparent that fuel and pressure 9o retainer for a nozzle 5. Above the nozzle in supplied through the pipe 26 will nd its the bore 2 is fitted a cylindrical block 6. Way into the nozzle chamber 16, and the Thereabove is the block 7 and thereabove the chamber 18- Thc parts are so proportioned block 8. A cap nut 9 is threaded into the end and arranged that in transverse sectional of the plug 1 as indicated to maintain the dearea the chamber 18 is greater than the' nozzle 95 scribed assembly of these parts which to- Opening 13, so that the valve is hydraulically gether comprise the valve body. unbalanced, and the vfuel pressure will tend The three blocks 6, 7 and 8 and the nut 9 to maintain the valve seated upon the nozzle. have central through openings as indicated to Any slight leakage will be carried 0H by way receive the valve 10. The openings in the of the pipe 21.

To unseat thejvalve to accomplish injection, a nut 28 is rigidly secured upon the outwardly extending stem portion of the valve .for cooperation with a lever 29. This lever l 29 may be fulcr'umed as at 30 on supports 31 which may be integralfwith the plug 1,-v and theopposite end of the lever may be actuated through the usual push rod 32 of the usual valve gear. As will be understood by one vfamiliar' with the art, the lever 29 may thus be moved counterclockwise, Fig. 1, periodically withthe engine cycle and in properly timed relation therein, to lift the valve from its seatagainst the Huid pressure tending to maintain the valve seated; Obviously, instantly the valve is thus unseated injection will take place through the nozzle opening 13, at the pressure provided from. the pipe 26. Return movement of the lever v29 allows the pressure in the -chamber 18 to instantly reseat the valve and thus cut of injection.

vWhat I claim is:

1. Liquid fuel injection means for an internal combustion engine comprising a valve body having a valve-receiving opening and a` nozzle portion, and an injection valve mov-v able in said opening -to control discharge throuh said nozzle, said parts being ar range for cooperation to provide a air of chambers, one communicating with e noz-V zle opening, the other separated from said nozzle chamber-b an enlarged portion ofY said valve, said v ve having: fuel feed pas sage communicatin with thsaid chambers, a flexible fuel eed connection providing fuel feed to said valvev passage, the parts being so proportioned and that fuel permute forces will act in said second r to maintain the valve seated, and means for unseating the valve periodically with the engine cycle.

2. Liquid fuelinjection means for an intei-nal combustion engine comprising a valve 4l body having a valvereoeiving opening and a nozzle portion, and an injection valve movable in said opening to control 1: through said nozzle, said opening and valve ha cooperative enlarged portions arl0 to provide an annular chamber removed from .said nozzle portion, said valve having a through opening leading to said nozzle and adpaage connecting said opening with sai annular chamber, the partsv i5 being so proportioned and that fuel pressure forces at said nozzle will be conimunicated to said chamber and there act to the valve seated. In testimony whereof I hereby ax--my 00 signature.

. GEORGE W. OODRINGTON. 

